Can’t say much about this hack. My playthrough ended on stage 2-2. And what stopped me was not the amount of stupidly placed enemies or tough platforming (which does not even exist here) but FIVE gaps in a row that are three blocks wide (an extremely difficult jump) without a way to skip them. And I checked the patched rom with Stake in hope that there was a hidden stair somewhere. Nope, I was too naive, it seems. Just what was the creator of this hack thinking when he decided that giving 99 lives will miraculously hold players for more than a few futile attempts?